MICRF008BM TR Micrel Inc, MICRF008BM TR Datasheet
![](/photos/31/26/312664/5768soic_sml.jpg)
MICRF008BM TR
Specifications of MICRF008BM TR
Related parts for MICRF008BM TR
MICRF008BM TR Summary of contents
Page 1
... C1 1.8pF L1 33nH QwikRadio is a registered trademark of Micrel, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 ( August 2008 Features Complete UHF receiver on a monolithic chip 300MHz to 440MHz frequency range Up to 4.8kbps data rate. Automatic tuning, no manual adjustment ...
Page 2
Micrel, Inc. Ordering Information Part Number Junction Temperature Range MICRF008YM Pin Configuration Pin Description Pin Number Pin Name SOIC-8 1 SEL0 2 ANT 3 VDD 4 CTH VSS 7 CAGC 8 REFOSC August 2008 Package –40°C to ...
Page 3
Micrel, Inc. Absolute Maximum Ratings Supply Voltage ( )........................................+7V DDRF DDBB Reference Oscillator Input Voltage (V Input/Output Voltage (V ). ....................V I/O Junction Temperature (T ) ....................................... +150°C J Storage Temperature (T ) ........................... –65°C to 150°C s ...
Page 4
Micrel, Inc. Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. Devices are ESD sensitive, use appropriate ESD precautions. Meets class 1 ESD test requirements, ...
Page 5
Micrel, Inc. C source impedance in Table 1 is represented by TH (symbolic) resistor RSC in the MICRF008 Simplified Block Diagram. The Programmable LPF (Low Pass Filter) is also illustrated in the MICRF008 Simplified Block Diagram. Typical Characteristics Supply Current ...
Page 6
Micrel, Inc. Functional Diagram RF ANT Amp VCC VSS SEL0 REFOSC Ceramic Resonator Reference and Control Functional Description The entire block diagram illustrates the basic structure of the MICRF008YM made of three sub-blocks, which are the UHF Downconverter, ...
Page 7
Micrel, Inc. proportional to REFOSC frequency. The nominal value of RSC given in the “Electrical Characteristics ” Table is 220kΩ for a REFOSC frequency of 3.36MHz. Slicing level time constant value vary depending on data pattern, data rate and data ...
Page 8
Micrel, Inc. VDDBB Compa- rator VSSBB Figure 4. DO Pin REFOSC Pin The REFOSC input circuit is shown in Figure 5. Input impedance is quite high (200kΩ). This is a Colpitts oscillator, with internal 30pF capacitors. This input is intended ...
Page 9
Micrel, Inc. Test Circuit ANT1 Z = ± Test Circuit and Application Information The test circuit is based on the EVAL8 PCB Design. Gerbers, the bill of material and complete schematic are available at Micrel website: (http://www.micrel.com/product-info/qwikradio.shtml). ...
Page 10
Micrel, Inc. Input Connector/Antenna Starting at J2, a SMA connector to connect signal generator. Levels above –20dBm should be avoided. An antenna pad is also provided. Solder a piece of solid wire for the frequency of interest. ...
Page 11
Micrel, Inc. C Capacitor TH In order to calculate the right value for the C the data format needs to have a preamble that resembles the data pattern, that is it has the same period and duty cycle. (See “Application ...
Page 12
Micrel, Inc. SEL0 Pin – Setting the Demodulator Bandwidth The SEL0 pin sets the demodulator bandwidth. When the pin is connected to ground the demodulator bandwidth is set to its minimum. When the pin is left floating (internal pull-up) or ...
Page 13
Micrel, Inc. Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. ...